Patent No. EP3464588 (titled "Preservation Of Cell-Free Nucleic Acids In Biological Samples") was filed by Norgen Biotek on May 16, 2017. The application was issued on Jan 8, 2025.

Patent oppositions filed by competitors challenge the validity of a granted patent. These oppositions are typically based on claims of prior art, lack of novelty, or non-obviousness. They are a key part of the process for determining a patent's strength and enforceability.
| Company | Opposition Date | Representative |
|---|---|---|
| PREANALYTIX GMBH | Apr 27, 2023 | KONIG SZYNKA TILMANN VON RENESSE PATENTANWALTE PARTNERSCHAFT MBB DUSSELDORF |
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